C. B. Wall Telephone
A central battery wall instrument embodying a writing desk and instruction card frame with glass.
The case is matt polished hardwood.
Solid-back transmitter on adjustable arm.
"Bell" receiver on removable switch hook.
Induction Coil, 2 M.f. condenser and enclosed terminals.
External metal fittings finished in durable black and copper bronze.
Receiver cord N4060
Overall dimensions 18 x 10 x 8.25 inches
Weight 9 lb.
Based on early Western Electric types and introduced around 1906.
Used by the GPO as their CB Telephone No. 1
Taken from the Ericsson catalogue, edition 26
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